# Claude Fable 5.1 vs Claude Opus 5

As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in 8 of 9 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, Vision, and Factuality.

Claude Fable 5.1: $20 per 1M blended tokens.

Claude Opus 5: $10 per 1M blended tokens.

Claude Fable 5.1: closed weights.

Claude Opus 5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in General LLM at #6 against #11.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Reasoning at #5 against #9.
- Which to pick, Coding: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Coding at #3 against #4.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Coding › Agentic at #3 against #4.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Coding › Web dev at #5 against #6.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Long context at #6 against #9.
- Which to pick, Vision: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Vision at #6 against #12.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads Claude Opus 5 in Factuality at #1 against #4.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Fable 5.1 and Claude Opus 5 share #3 in Abstraction (ARC).

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).